EP4200212B1

EP4200212B1 - Structural shroud assembly for passenger seat

Info

Publication number: EP4200212B1
Application number: EP20764891.6A
Authority: EP
Inventors: Romain TRANIER; Anthony Tran
Original assignee: Safran Seats USA LLC
Current assignee: Safran Seats USA LLC
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2025-01-29
Anticipated expiration: 2040-08-19
Also published as: CN116234750A; EP4200212A1; WO2022039735A1; EP4200213A1; CN115956050A; WO2022039788A1; US20230322138A1; US20240034210A1; US12187174B2

Description

FIELD OF THE INVENTION

The field of the invention relates to seats for passenger vehicles, and more particularly to structural assemblies for various components of such seats.

BACKGROUND

Passenger vehicles, such as aircraft, buses, trains, ships, and automobiles, include passenger seats in which passengers can be seated and otherwise use during travel Existing passenger seats include a number of structural components at various locations on the passenger seats. For example, spreaders may serve as an interface at which various components of the passenger seat such as an armrest, seat back, table, leg assembly, etc. can be connected. This typical/traditional construction imposes limitations such as a higher part count, material waste, and compromises between optimization and manufacturability.
Document US2019/070989 describes a passenger seat assembly with a lower frame configured to support a seat bottom of the passenger seat and a backrest frame attached to the lower frame and configured to support a backrest assembly. Document US2010/187894 describes a seat with one or more lightweight composite support legs, a lightweight composite seat pan. and a lightweight composite seat back structure. The support legs are coupled to the seat pan. which is in turn coupled to the seat back structure. The support legs utilize composite frame elements that are formed as continuous compression molded composite extrusions. The seat pan includes composite fore and aft cross beams that are also formed as continuous compression molded composite extrusions.
The aft cross beam includes a rear flange that serves as a flexible "hinge" for the seat back structure. Document US6179381 describes a seating structure with a pair of spaced side supports, a seat pivotably mounted between the side supports, a back fixed to the side supports, an electrical outlet positioned on one of the side supports, and at least one data outlet positioned on one of the side supports. Each of the side supports includes an outlet housing affixed to the lower surface of an arm rest contained on the side support. The outlet housing extends inwardly toward the seat surface and provides the seat occupant with an electrical outlet and at least one data outlet. The electrical wiring and data line for each seat assembly pass through a wireway contained in the seat back. Document US6505890 describes a seat structure of the aircraft to store a source of pressurized gas or solid fuel necessary to expand the passive restraint is disclosed. The seat structure of the aircraft comprises multiple hollow tubes, and these hollow tubes can be utilized to either store pressurized gas or solid fuel directly, or to house a vessel that stores pressurized gas or solid fuel.
Document EP3181450 describes an arm rest, a mounting bosshead defining a curved slot and comprising a curved boss, and a pin received by the curved slot and defining a groove, the pin configured for receipt by the curved slot in a selected first or second position, the first position having the curved boss aligned with the groove so as to permit travel of the pin within the curved slot and pivoting of the arm rest relative to the mounting bosshead and the second position having the curved boss misaligned with the groove so as to prevent pivoting of the arm rest relative to the mounting bosshead.
Document WO 82/03366 A1 discloses a seat back attachment post which is a carbon fibre/Kelvar shell structure mechanically interlocking with the back end of a seat support to which it is secured by a fixing bolt.

SUMMARY

The terms "invention," "the invention," "this invention" and "the present invention" used in this patent are intended to refer broadly to all of the subject matter of this patent and the patent claims below. Statements containing these terms should be understood not to limit the subject matter described herein or to limit the meaning or scope of the patent claims below, insofar as they fall within the scope of the appended claims.
Embodiments of the invention covered by this patent are defined by the claims below, not this summary. This summary is a high-level overview of various aspects of the invention and introduces some of the concepts that are further described in the Detailed Description section below. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used in isolation to determine the scope of the claimed subject matter. The subject matter should be understood by reference to appropriate portions of the entire specification of this patent, any or all drawings and each claim.
A passenger seat assembly is provided, according to claim 1.
Optional embodiments are defined by the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a passenger seat according to certain embodiments of the present invention.
FIG. 2 is an exploded view of a spreader assembly according to certain embodiments of the present invention.
FIG. 3 is a perspective view of the spreader assembly of FIG. 2.
FIG. 4 is a side view of a spreader assembly according to an unclaimed example.
FIG. 5 is a side view of a lower spreader of the spreader assembly of FIG. 4.
FIG. 6 is a side view of a spreader assembly according to an unclaimed example.
FIG. 7 is a rear view of the spreader assembly of FIG. 6.
FIG. 8 is an exploded view of an armrest assembly according to certain embodiments of the present invention.

DETAILED DESCRIPTION

As illustrated in FIG. 1, a passenger seat assembly 100 may include a seat base 102 and one or more seat backs 104 supported relative to the seat base 102. The number of seat backs 104 should not be considered limiting on the disclosure. In various examples, the number of seat backs 104 correspond with the number of passengers that the passenger seat is capable of carrying, and each seat back 104 and the corresponding portion of the seat base 102 define a particular passenger seat 126. In the example of FIG. 1, the passenger seat assembly 100 is capable of carrying one passenger, and accordingly has one seat back 104 and one passenger seat 126. However, in other examples, the passenger seat assembly 100 may be capable of carrying any desired number of passengers, such as one passenger, two passengers, three passengers, four passengers, or any other desired number of passengers. In these examples, the passenger seat assembly 100 can likewise have any desired number of corresponding seat backs 104.
The seat base 102 of the passenger seat assembly 100 generally includes a leg assembly 108 and at least one base frame tube 110. The seat base 102 may also include a support frame 106, an armrest 112, a spreader 114, a luggage bar 116, or other components. Cushioning (not illustrated) may be provided on any of the components of the seat base 102.
The seat back 104 is connected to the seat base 102, and is often pivotable relative to the seat base 102 such that the seat back 104 can be positioned in various positions such as a taxi-takeoff-landing (TTL) position, a reclined position, etc. In certain aspects, the seat back 104 is connected to the seat base 102 via the spreader 114. The seat back 104 includes a frame component 118 having a forward side 120 and an aft side 122. In some cases, other components of the passenger seat assembly 100 such as a tray table 124, an in-flight entertainment monitor, or various other components may be supported on and/or relative to the seat back 104. In certain cases, other components, such as the tray table 124 may be pivotably connected to the spreader 114, and the tray table 124 may be movable relative to the aft side 122 of the seat back 104 between a stowed position and a deployed position. Cushioning (not illustrated) may be provided on any of the components of the seat back 104.
Various structural assemblies of the seat base 102 and/or the seat back 104 may be subjected to different types of loads or forces when used. As one non-limiting example, with the spreader 114, a lower portion of the spreader 114 (e.g., the portion that engages the base frame tube(s) 110) may be subjected to pulling loads or forces during use, and an upper portion of the spreader 114 (e.g., the portion that connects with the seat back 104) may be subjected to pushing loads during use. Other structural assemblies of the seat base 102 and/or the seat back 104 include, but are not limited to armrests and in-flight entertainment shrouds. In certain aspects, and as discussed in detail below, one or more of the structural assemblies may include a structural shroud.
FIGS. 2 and 3 illustrate an example of a spreader assembly 214 having an upper spreader 226 and a lower spreader 228. Similar to the spreader 114, the spreader assembly 214 is configured to connect a seat back with the seat base as well as support various other components such as a tray table. In various embodiments, and as discussed below, the upper spreader 226 is configured to engage with and/or support a seat back of the passenger seat and/or other components such as a tray table and may be subject to pushing loads during use, and the lower spreader 228 is configured to engage with the base frame tube(s) 110 and may be subject to pulling loads during use.
The upper spreader 226 is a structural shroud 230 having a first end 232 and a second end 234 opposite from the first end 232. The structural shroud 230 also has an inner surface 246 and an outer surface 248 extending from the first end 232 to the second end 234. As illustrated in FIGS. 2 and 3, the inner surface 246 defines a central cavity 236 such that the structural shroud 230 is hollow along a length of the structural shroud 230. In other words, a cross-sectional shape of the structural shroud 230 may have a hollow center due to the central cavity 236. In various examples, at least one of the first end 232 or the second end 234 defines an opening providing access to the central cavity 236. In the embodiment of FIGS. 2 and 3, the first end 232 includes a first opening 238 providing access to the central cavity 236 and the second end 234 includes a second opening 240 providing access to the central cavity 236. Optionally, an intermediate opening 278 between the first end 232 and the second end 234 providing access to the central cavity 236. In some non-limiting examples, a component of the passenger seat assembly, including but not limited to a power outlet, USB outlet, or other amenity or component of the passenger seat may be provided in the intermediate opening 278. In certain aspects, the first end 232 may be a top-most portion of the assembled upper spreader 226 and lower spreader 228. In some embodiments, a stiffener or reinforcing component 251 may optionally be provided on the structural shroud 230. The stiffener or reinforcing component 251 may be provided on the inner surface 246 and/or the outer surface 248 as desired, and may stiffen the structural shroud 230. In various embodiments, the stiffener or reinforcing component 251 may be a separate component attached to the structural shroud or may be integrally formed with the structural shroud.
In some embodiments, the structural shroud 230 includes a first shroud 242 and a second shroud 244 connected to the first shroud 242. In various cases, the first shroud 242 may be connected to the second shroud 244 via various suitable devices or mechanisms as desired such that the second shroud 244 may be selectively removed from the first shroud 242 (e.g., to allow greater access to the central cavity 236. As one non-limiting example, the second shroud 244 may be removably connected to the first shroud 242 via mechanical fasteners such that cabling or wiring or other features within the central cavity 236 may be accessed as desired. The structural shroud 230 may be constructed from various suitable materials, including but not limited to aluminum, stainless steel, aramid fibers, polycarbonate, polypropylene, other metallic materials, composite materials, or other similar materials. In one non-limiting example, the structural shroud 230 is constructed from a reinforced plastic such as a sheet molding compound.
As illustrated in FIGS. 2 and 3, the lower spreader 228 includes a forward end 254 and an aft end 256 opposite of the forward end 254. Compared to the upper spreader 226, the lower spreader 228 does not include an inner surface extending along a length of the lower spreader and/or a central cavity. In other words, a cross-sectional shape of the lower spreader 228 may be different from that of the upper spreader 226. In some non-limiting embodiments, a center of the cross-sectional shape of the lower spreader 228 may be solid other than locations with apertures for the base frame tube(s) (discussed below). In certain aspects, the forward end 254 may be a forward-most portion of the spreader assembly 214. In various aspects, the aft end 256 may be an aft-most portion and/or a lowermost portion of the spreader assembly 214, although it need not be the aft-most and/or the lowermost portion. In the example of FIGS. 2 and 3, a portion of the upper spreader 226 extends aft of the aft end 256. In other embodiments, the lower spreader 228 may be a structural shroud similar to the structural shroud 230 and may define a central cavity such that the lower spreader 228 is hollow. The lower spreader 228 is a separate component that is connected to the upper spreader 226 via various suitable connectors or connecting mechanisms as desired, or in an unclaimed example, the lower spreader 228 and the upper spreader 226 may be formed as a monolithic or integral component.
The lower spreader 228 includes one or more apertures 258 defined through a thickness of the lower spreader 228 between the forward end 254 and the aft end 256 that receive and engage base frame tube(s) of the passenger seat assembly. In the embodiment of FIGS. 2 and 3, the lower spreader 228 includes two apertures 258. In other embodiments, or other suitable interfacing for the base frame tube(s) may be provided. The lower spreader 228 may also include interfacing for other components of the seat base of the passenger seat assembly as desired. The lower spreader 228 may be constructed from various materials as desired suitable for engaging the base frame tube(s) and the upper spreader 226.
The upper spreader 226 may be connected to the lower spreader 228 proximate to the second end 234. In various examples, the lower spreader 228 may include an interface 266 that may be used to connect the upper spreader 226 with the lower spreader 228. As best illustrated in FIG. 2, in the embodiment of FIGS. 2 and 3, the interface 266 includes a ridge 268 having a securing aperture 270. Various other types of interfaces 266 may be utilized as desired, and the ridge 268 and/or securing aperture 270 need not be included. In some cases, the lower spreader 228 may be partially received within the central cavity 236, although it need not in other examples (see, e.g., FIG. 4). The upper spreader 226 may be connected to the lower spreader 228 via various suitable devices or mechanisms as desired, including but not limited to mechanical fasteners.
Connectors and/or other components that engage with features of the seat back are provided on the structural shroud 230 and extend outwards from the outer surface 248. Such connectors and/or other components may be connected to the structural shroud 230 via various suitable mechanisms or devices as desired, or they may be integrally or monolithically formed with the structural shroud 230. In the embodiment of FIGS. 2 and 3, the structural shroud 230 includes a table pivot 250 and a table stop 252 integrally formed with the structural shroud 230.
Optionally, and as illustrated in FIGS. 2 and 3, the spreader assembly 214 includes an armrest pivot 260 supported proximate to the first end 232 of the upper spreader 226. The armrest pivot 260 may connected to the upper spreader 226 via various suitable devices or mechanisms as desired. In certain aspects, the armrest pivot 260 includes one or more pivot grooves 262 that may interface with an armrest such that the armrest is pivotable relative to the spreader assembly 214.
The spreader assembly 214, which may be referred to as a "split" spreader assembly, may be advantageous over traditional spreaders. In one aspect, the split spreader assembly 214 may maximize the inertia of the upper spreader 226 and reduce the mass needed to achieve the required stiffness to withstand forces from the armrest, seat back, etc. The split spreader assembly 214 may also optionally reduce the number of parts required for a spreader by embedding one or more of the components (e.g., stiffener, table stops, pivots, etc.), into the structural shroud. In some cases, the split spreader assembly 214 may reduce the amount of material waste that is caused by the typical crescent shape of traditional spreaders. The split spreader assembly 214 may also optimize stiffness and strength requirements for portion that engages the armrest, seat back, etc. independently from the stiffness and strength requirements for the portion that engages the base frame tube(s) and needing to withstand 16G loads.
FIGS. 4 and 5 illustrate an unclaimed example of a spreader assembly 414 that is substantially similar to the spreader assembly 214 and includes an upper spreader 426 and a lower spreader 428. The upper spreader 426 is similar to the upper spreader 226 and includes a structural shroud 430. Compared to the upper spreader 226, the structural shroud 430 of the upper spreader 426 has a different shape than the structural shroud 230, and the structural shroud 430 is a monolithic and does not include the first shroud 242 and the second shroud 244. As illustrated in FIG. 4, an interface component 464 may connect the armrest pivot 260 with the upper spreader 426. The lower spreader 428 is substantially similar to the lower spreader 428 except that the interface 266 includes a ridge 468 having two securing apertures 270.
FIGS. 6 and 7 illustrate an unclaimed example of a spreader assembly 614 that is substantially similar to the spreader assembly 214 and includes an upper spreader 626 and a lower spreader 628. The upper spreader 626 is similar to the upper spreader 226 and includes a structural shroud 630. Compared to the upper spreader 226, the structural shroud 630 of the upper spreader 626 has a different shape than the structural shroud 230, and the structural shroud 630 is a monolithic and does not include the first shroud 242 and the second shroud 244. The lower spreader 428 is substantially similar to the lower spreader 428 except that the interface 266 includes a ledge 672 that engages the upper spreader 626 and secures the lower spreader 628 to the upper spreader 626 without requiring separate fasteners or other joining devices. Compared to the spreader assembly 214, a table pivot 650 and a table stop 652 are separate components from the structural shroud 630 that are supported on the structural shroud 630.
FIG. 8 illustrates an example of an armrest 812 having a structural shroud 830. Similar to the structural shroud 230, the structural shroud 830 includes a first shroud 842 and a second shroud 844. Compared to the structural shroud 230, the second end 234 of the structural shroud 830 does not include second opening 240. In the embodiment of FIG. 8, the intermediate opening 278 is configured to receive an actuator 874 of the armrest 812, and cabling 876 for the actuator 874 may be housed within the central cavity 236.
Different arrangements of the components depicted in the drawings or described above, as well as components and steps not shown or described are possible. Embodiments of the invention have been described for illustrative and not restrictive purposes, and alternative embodiments will become apparent to readers of this patent. Accordingly, the present invention is not limited to the embodiments described above or depicted in the drawings, and various embodiments and modifications may be made without departing from the scope of the claims below.

Claims

A passenger seat assembly (100) comprising a spreader assembly (214), the spreader assembly (214) comprising:
a lower spreader (228) extending in a forward direction and defining a forward-most portion of the spreader assembly (214); the lower spreader (228) including a forward end (254) and an aft end (256) opposite of the forward end (254), the lower spreader (228) including one or more apertures (258) defined through a thickness of the lower spreader (228) between the forward end (254) and the aft end (256) and configured to receive and engage base frame tube(s) of the passenger seat assembly (100), and

an upper spreader (226) attached to the lower spreader (228) and extending in a vertical direction relative to the lower spreader (228), wherein the upper spreader (226) is a structural shroud (230) having a first end (232) and a second end (234) opposite from the first end (232), wherein the upper spreader (226) defines a top-most portion of the spreader assembly (214), wherein the upper spreader (226) is configured to support a seat back of the passenger seat assembly, such that connectors and/or other components configured engage with features of the seat back are provided on the structural shroud (230) and extend outwards from an outer surface (248) of the structural shroud (230),

characterized in that the structural shroud (230) comprises a first shroud (242) and a second shroud (244) attached to the first shroud (242), and wherein the first shroud (242) and the second shroud (244) together define a central cavity such that the upper spreader (226) is hollow.
The passenger seat assembly of claim 1, wherein a cross-sectional shape of the upper spreader (226) is different from a cross-sectional shape of the lower spreader (228).
The passenger seat assembly of claim 1 or 2, further comprising the seat back supported by the upper spreader (226), and wherein the lower spreader (228) is configured to attach to at least one seat beam tube.
The passenger seat assembly of any of the claims 1 to 3, wherein the upper spreader (226) is attached to an aft portion of the lower spreader (228).
The passenger seat assembly of claim 4, wherein the upper spreader is an aft-most portion of the spreader assembly (214).
The passenger seat assembly of any of the claims 1 to 5, further comprising an armrest pivot supported at an end of the upper spreader (226) opposite from the lower spreader (228).
The passenger seat assembly of any of the claims 1 to 6, further comprising a table stop integrally formed with the upper spreader (226).